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80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package plugin
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import (
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"errors"
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"sync"
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)
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// PluginsStore holds a list of DRA Plugins.
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type pluginsStore struct {
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sync.RWMutex
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store map[string]*Plugin
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}
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// draPlugins map keeps track of all registered DRA plugins on the node
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// and their corresponding sockets.
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var draPlugins = &pluginsStore{}
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// Get lets you retrieve a DRA Plugin by name.
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// This method is protected by a mutex.
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func (s *pluginsStore) get(pluginName string) *Plugin {
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s.RLock()
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defer s.RUnlock()
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return s.store[pluginName]
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}
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// Set lets you save a DRA Plugin to the list and give it a specific name.
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// This method is protected by a mutex.
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func (s *pluginsStore) add(p *Plugin) (replacedPlugin *Plugin, replaced bool) {
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s.Lock()
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defer s.Unlock()
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if s.store == nil {
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s.store = make(map[string]*Plugin)
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}
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replacedPlugin, exists := s.store[p.name]
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s.store[p.name] = p
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if replacedPlugin != nil && replacedPlugin.cancel != nil {
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replacedPlugin.cancel(errors.New("plugin got replaced"))
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}
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return replacedPlugin, exists
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}
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// Delete lets you delete a DRA Plugin by name.
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// This method is protected by a mutex.
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func (s *pluginsStore) delete(pluginName string) *Plugin {
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s.Lock()
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defer s.Unlock()
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p, exists := s.store[pluginName]
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if !exists {
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return nil
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}
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if p.cancel != nil {
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p.cancel(errors.New("plugin got removed"))
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}
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delete(s.store, pluginName)
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return p
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}
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